North-East India Helminth Parasite Information Database

Orthocoelium scoliocoelium (Yamaguti Yamaguti) Fischoeder 1904 Back


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                                   Orthocoelium (Stiles et Goldberger, 1910) Price et McIntosh, 1953 »
                                           Orthocoelium scoliocoelium (Fischoeder 1904), Yamaguti 1971


(Paramphistomum scolicoelium Fischoeder, 1904; Cotylophoron ovatum Harshey, 1934)


Bos (indicus), Capra (hircus), Ovis (aries)




Guwahati (Assam), Moranhat (Assam), Silchar (Assam), Karimganj (Assam), Dharmanagar (Tripura), Agartala (Tripura)


Body elongated, conical, 3.48-4.74 mm in length, 1.96-2.62 mm in width, ratio of body width to body length 1:1.75-1:2. Acetabulum subterminal or ventral, 0.88-1.58 mm in external diameter; ratio to body length 1:2.60-1:3.25; of streptocoelium type (sensu Näsmark, 1937) in median sagittal section; units of circular muscles on lateral sides as follows: d.e.c.m. 10-14, d.i.c.m. 15-20, v.e.c.m. 11-15, v.i.c.m. 20-24, m.e.c.m. 6-14. Pharynx 0.40-0.63 mm in length, 0.49-0.58 mm in width; ratio to body length 1:4.44-1:10.72, to diameter of acetabulum 1:2.16-1:3.61; of dicranocoelium type (sensu Näsmark, 1937) in median sagittal section. Oesophagus 0.22-0.31 mm long, musculature forming a strong muscular bulb. Caeca lateral, reaching acetabulum. Testes tandem, anterior testis 0.27-0.67 mm in length, 0.27-0.85 mm in width; posterior testis 0.22-0.54 mm in length, 0.27-0.99 mm in width. Seminal vesicle thin walled, coiled; pars musculosa well developed. Ovary 0.13-0.22 mm by 0.09-0.33 mm, posterior to testes, close to Mehlis' gland. Laurer's canal not crossing excretory vesicle or duct, opening dorsally about 0.22-0.31 mm anterior to excretory pore. Vitellaria lateral, extending from level of oesophagus to posterior level of acetabulum. Eggs 0.108-0.135 mm by 0.067-0.090 mm. Terminal genitalium of scoliocoelium type (sensu Näsmark, 1937) in median sagittal section, genital pore opening ventral1y at level posterior to oesophageal bifurcation.


Soota and Ghosh (1977) recorded this species from Meghalaya. The other localities in India where O. scoliocoelium has been recorded include Uttar Pradesh (Mukherjee, 1960; Gupta, 1965), Jammu & Kashmir (Bali, 1976), Calicut and West Bengal (Gupta and Nakhasi, 1977), Andhra Pradesh (Hafeez and Rao, 1980) and Himachal Pradesh (Tandon and Sharma, 1981). Except for minor variation in the shape and size of the body and its organs, the present observations conform to the descriptions given by Näsmark (1937), Eduardo (1985b) and Indian authors. Näsmark (1937) regarded Paramphistomum shipleyi Stiles et Goldberger, 1910 as a synonym of Ceylonocotyle (now Orthocoelium) scoliocoelium, whereas earlier Maplestone (1923) had suggested its synonymy with C. orthocoelium. Mehra (1980) and Eduardo (1985b) also agreed to the synonymy proposed by Näsmark (1937).

Helminthological collections record

NEHU/Z - TM/13

Specimen Type

Holotype: W7791/1 in Zological Survey of India, Kolkata.


Soota, T. D. and Ghosh, R. K. (1977). On some trematodes from Meghalaya. Records of Zoological Survey of India. 73:pp 111-122.

Mukherjee, R. P. (1960). Studies on the life of Ceylonocotyle scoleocoelium (Fischoeder, 1904), Näsmark, 1937, an amphistome parasite of sheep and goat. Proceedings of 47th Indian Science Congress. 3: 438-439.

Gupta, N. K. (1965b) On two amphistomid parasites of the genus Calicophoron from ungulates of economic importance in India. Research Bulletin (N.S.) of the Panjab University.16:pp 283-289.

Bali, H. S. (1976). A survey of helminth parasites of sheep (Ovis aries) in Jammu and Kashmir. Journal of Animal Health and Production. 6:pp 25-32.

Gupta, N. K. and Nakhasi, U. (1977). On some amphistomid parasites from India (Parts I & II). Revista Iberica de Parasitologia. 37:pp  205-225, 252-272.

Hafeez, Md. and Rao, B. V. (1980) Check-list of Amphistomes from cattle and buffaloes in Andhra Pradesh. The Veterinarian. 4:pp 5.

Tandon ,V. and Sharma, V. (1981). Amphistome fauna of ruminants in Himachal Pradesh. Indian Journal of Parasitology .5:pp  241-245.

Eduardo ,S .L. (1985b). The taxonomy of the family  Paramphistomidae Fischoeder, 1901 with special reference to the morphology of species occurring ruminants. VI. Revision of the genus Orthocoelium (Stiles& Goldberger, 1910) Price &McIntosh, 1953. Systematic Parasitology.7:pp 125-158.

Maplestone, P.A. (1923). A revision of the Amphistomata of mammals. Annals of Tropical Medicine and Parasitology. 17:pp 113-212.

Mehra, H. R. (1980). The fauna of India and the adjacent countries. Edited by the Director, Zoological Survey of India. pp 418.

Näsmark, K. E. (1937) Revision of the trematode family Paramphistomidae. Zoologiska Bidrag fran Uppsala. 16:pp 301-565.